Communication system architecture

At least one computer readable storage medium storing executable code which is configured to implement a method of resource allocation in a communication system comprising a plurality of processing units, each having access to computer storage holding executable code modules for managing the communication event between a first end user device and a second end user device, the code modules being configured to implement media modality controllers configured to manage media modality of an established communication event and a call controller configured to establish the communication event, the media modality controllers including an audio controller configured to convey audio control signals between the first end user device and the second end user device and a video controller configured to convey video control signals between the first end user device and the second end user device, the method comprising:

• allocating first physical resources to the call controller;
• and
• independently allocating second physical resources to the audio controller, the second physical resources being different to the first physical resources;
• and
• independently allocating third physical resources to the video controller, the third physical resources being different to the first physical resources and the second physical resources.

A method of resource allocation in a communication system comprising a plurality of processing units, each having access to computer storage holding executable code modules for managing a communication event between a first end user device and a second end user device, the code modules being configured to implement a media modality controller configured to manage media modality of an established communication event and a call controller configured to establish the communication event, the method comprising:

• allocating first physical resources to the call controller;
• and
• independently allocating second physical resources to the media modality controller, the second physical resources being different to the first physical resources;
• wherein the code modules are configured to implement separate audio and video controllers, each of the audio and video controller being a respective media modality controller configured to convey control signals between the first end user device and the second end user device;
• and
• wherein a grant of physical resources to the audio controller is independent and different from a grant of physical resources to the video controller.